[jdev] Case sensitive & jid

[Remy HAREL]

files seem to be in idn/...


Remy HAREL wrote:

> 'Bonjour' Mathias,
>
> Ok, thanks guys.... So now I 'm gonna use stringprep, but there is an 
> implementation of stringprep with such profiles in jabberd 2 project 
> please ? I'm looking for it in files until someone will help me...
>
> Have a nice day,
>
>
>
> Matthias Wimmer wrote:
>
>> Hi Trejkaz!
>>
>> Trejkaz Xaoza schrieb am 2004-05-08 10:01:57:
>>
>>
>>>> Therefore md5(lowercase(jid_full)) would result in
>>>> the same hash for two different addresses!
>>>>
>>> That's actually a property of all hashes anyway. Comes with the 
>>> territory of reducing Y bytes to X bytes where X < Y.
>>>
>>
>> No not really. Sure there are always different strings that are mapped
>> to the same hash. But it's the property of hashes, that it is
>> hard/impossible to generate a second string that has the same hash on
>> purpose. (Else you could take a signature of one document and generate a
>> second document for which this signature is valid too and which tells
>> that the other person owes you 1,000,000 €.
>>
>> In the case of md5(lowercase(jid_full)) it would be trivial to generate
>> two addresses, that are mapped to the same hash.
>>
>> In case you think that this is "only" possible for resources and one
>> would only break his own addresses ... nope ... there are components
>> that allow different users to habe the same node and domain, but a
>> different resource: e.g. conference servers.
>>
>>
>> Tot kijk
>> Matthias
>>
>>
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>>
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>>
>
>


-- 
Remy Harel - remy.harel at gicm.fr
G.I.C.M - Distributed Systems & IT
Linux Registered User #224740